Using a pumice stone on stubborn toilet stains

I have wanting to try this out for a while. I found the pumice stone among the bathroom cleaning supplies at the grocery, for $4.

The instructions said to not be too quick to rinse away the pumice that comes off the stone, as it supplies much of the scrubbing effect.

Before I used the stones, I gave the toilets a quick scrub with the toilet brush--without chemicals--and scraped off a little of the stains with a bamboo chopstick.

I found that the pumice stone worked very well, although it wore down fast and quickly lost its sharper edges, which made it more difficult to get into the corners. Between our two toilets, I used up half of the stone.